to act cocky; to show off; to swaggerThis is an informal expression, usually used in phrases such as « Il se la ramène » or « Ne te la ramène pas ». It does not mean “to bring her/it back,” which would be « la ramener » without « se ».
FR: Il se la ramène toujours, mais il ne sait rien faire.
EN: He’s always acting cocky, but he can’t do anything.